News Column

Researchers Submit Patent Application, "Signal Processing Method, Connector, and Memory Storage Device", for Approval

August 27, 2014



By a News Reporter-Staff News Editor at Electronics Newsweekly -- From Washington, D.C., VerticalNews journalists report that a patent application by the inventors Chen, An-Chung (Hsinchu City, TW); Chen, Chih-Ming (Hsinchu County, TW), filed on April 16, 2013, was made available online on August 14, 2014.

The patent's assignee is Phison Electronics Corp.

News editors obtained the following quote from the background information supplied by the inventors: "The invention generally relates to a signal processing method. Particularly, the invention relates to a signal processing method of a connector, and a connector and a memory storage device using the same.

"Digital cameras, cell phones, and MP3 players have undergone rapid growth in recent years, so that consumer demands for storage media have also rapidly increased. Since a rewritable non-volatile memory module (for example, a flash memory) has characteristics of data non-volatility, low power consumption, small volume, and non-mechanical structure, etc., it is adapted to be built in the aforementioned various portable multimedia devices.

"Generally, the rewritable non-volatile memory module is coupled to a host system through a connector. In some communication standards, a spread spectrum clock (SSC) operation is probably performed on a signal stream transmitted between the connector and the host system, i.e. a frequency of the signal stream is varied along with time within a certain range, such that energy of the signal is distributed to a frequency band range to suppress electromagnetic interference (EMI) of the signal. Although the SSC operation can mitigate the influence of noise or interference, it may use a larger bandwidth, and the frequency of the signal stream is probably varied along with time. However, in some applications, the connector does not have a crystal oscillator to generate an accurate clock signal, instead, the connector generates the clock signal by referring to the signal stream transmitted by the host system. Therefore, it is an important issued concerted by related technicians to design a connector capable of generating an accurate output signal complied with the standards without using the crystal oscillator.

"Nothing herein should be construed as an admission of knowledge in the prior art of any portion of the present invention. Furthermore, citation or identification of any document in this application is not an admission that such document is available as prior art to the present invention, or that any reference forms a part of the common general knowledge in the art."

As a supplement to the background information on this patent application, VerticalNews correspondents also obtained the inventors' summary information for this patent application: "The exemplary embodiments of the invention are directed to a signal processing method, a connector and a memory storage device, and the connector without a crystal oscillator is capable of generating an output signal complied with a specific standard.

"An exemplary embodiment of the invention provides a signal processing method for a connector, where the connector does not include a crystal oscillator. The signal processing method includes following steps. A first signal stream is received from a host system. A transmission frequency of the first signal stream is tracked, and a frequency shift quantity of the first signal stream relative to the transmission frequency is obtained. It is determined whether a spread spectrum operation is performed on the first signal stream according to the frequency shift quantity to generate a determination result. A second signal stream is generated according to the determination result and the transmission frequency.

"According to another aspect, an exemplary embodiment of the disclosure provides a connector. The connector does not include a crystal oscillator, and includes a reception circuit, a frequency tracking circuit and a transmission circuit. The reception circuit receives a first signal stream from a host system. The frequency tracking circuit is coupled to the reception circuit, and tracks a transmission frequency of the first signal stream. The transmission circuit is coupled to the reception circuit and the frequency tracking circuit. The reception circuit obtains a frequency shift quantity of the first signal stream relative to the transmission frequency, and determines whether a spread spectrum operation is performed on the first signal stream according to the frequency shift quantity to generate a determination result. The transmission circuit generates a second signal stream according to the determination result and the transmission frequency.

"According to another aspect, an exemplary embodiment of the invention provides a memory storage device including a rewritable non-volatile memory module, a memory controller and a connector. The rewritable non-volatile memory module includes a plurality of physical erasing units. The memory controller is coupled to the rewritable non-volatile memory module. The connector is coupled to the memory controller, and is coupled to a host system. The connector does not include a crystal oscillator, and includes a reception circuit, a frequency tracking circuit and a transmission circuit. The reception circuit receives a first signal stream from the host system. The frequency tracking circuit is coupled to the reception circuit, and tracks a transmission frequency of the first signal stream. The transmission circuit is coupled to the reception circuit and the frequency tracking circuit. The reception circuit obtains a frequency shift quantity of the first signal stream relative to the transmission frequency, and determines whether a spread spectrum operation is performed on the first signal stream according to the frequency shift quantity to generate a determination result. The transmission circuit generates a second signal stream according to the determination result and the transmission frequency.

"According to the above descriptions, the signal processing method, the connector and the memory storage device of the invention may detect whether the spread spectrum operation is performed on the signal stream come from the host system without using the crystal oscillator, and correspondingly performs the spread spectrum operation on the signal stream transmitted to the host system.

"It should be understood, however, that this Summary may not contain all of the aspects and embodiments of the present invention, is not meant to be limiting or restrictive in any manner, and that the invention as disclosed herein is and will be understood by those of ordinary skill in the art to encompass obvious improvements and modifications thereto.

"In order to make the aforementioned and other features and advantages of the invention comprehensible, several exemplary embodiments accompanied with figures are described in detail below.

BRIEF DESCRIPTION OF THE DRAWINGS

"The accompanying drawings are included to provide a further understanding of the invention, and are incorporated in and constitute a part of this specification. The drawings illustrate embodiments of the invention and, together with the description, serve to explain the principles of the invention.

"FIG. 1A is a schematic diagram of a host system and a memory storage device according to an exemplary embodiment of the invention.

"FIG. 1B is a schematic diagram of a computer, an input/output device and a memory storage device according to an exemplary embodiment of the invention.

"FIG. 1C is a schematic diagram of a host system and a memory storage device according to an exemplary embodiment of the invention.

"FIG. 2 is a schematic block diagram of the memory storage device of FIG. 1A.

"FIG. 3 is a block diagram of a connector according to an exemplary embodiment of the invention.

"FIG. 4 is a block diagram of a connector 102 according to an exemplary embodiment of the invention.

"FIG. 5 is a schematic diagram of tracking a first signal stream according to an exemplary embodiment of the invention.

"FIG. 6 and FIG. 7 are schematic diagrams of determining whether a spread spectrum operation is performed according to an exemplary embodiment of the invention.

"FIG. 8A and FIG. 8B are schematic diagrams of generating a second signal stream according to an exemplary embodiment of the invention.

"FIG. 9 is a flowchart illustrating a signal processing method according to an exemplary embodiment of the invention."

For additional information on this patent application, see: Chen, An-Chung; Chen, Chih-Ming. Signal Processing Method, Connector, and Memory Storage Device. Filed April 16, 2013 and posted August 14, 2014. Patent URL: http://appft.uspto.gov/netacgi/nph-Parser?Sect1=PTO2&Sect2=HITOFF&u=%2Fnetahtml%2FPTO%2Fsearch-adv.html&r=4307&p=87&f=G&l=50&d=PG01&S1=20140807.PD.&OS=PD/20140807&RS=PD/20140807

Keywords for this news article include: Signal Processing, Phison Electronics Corp..

Our reports deliver fact-based news of research and discoveries from around the world. Copyright 2014, NewsRx LLC


For more stories covering the world of technology, please see HispanicBusiness' Tech Channel



Source: Electronics Newsweekly


Story Tools






HispanicBusiness.com Facebook Linkedin Twitter RSS Feed Email Alerts & Newsletters